<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>


    <style>
        body{
            background: linen;
        }

        div{
            width: 300px;
            height: 300px;
            background: red;
            transition: all 2s linear 2s;
            display: block;
            /* all 所有的
                2s 动画持续时间
                linear 匀速
                最后一个 延迟

                除了 display :none/block 
            */

        }

        div:hover{
            height: 600px;
            width: 400px;
            background: yellow;
        }

   
    </style>

</head>
<body>
    

    <div>


    </div>

</body>
</html>